Efficient synthesis of 2,4-diaryl hexahydroquinoline-5-one derivatives in the presence of triethylamine
作者:Zahed Karimi-Jaberi、Maryam Azadi
DOI:10.1007/s11164-014-1773-8
日期:2015.9
A convenient and efficient protocol for the synthesis of 2,4-diaryl hexahydroquinoline-5-one derivatives has been accomplished by a three-component reaction of 1,3-diaryl-2-propen-1-ones, dimedone and ammoniumacetatecatalyzed by triethylamine under solvent-free conditions. The simple experimental procedure, use of an inexpensive catalyst, short reaction times, and excellent yields make this procedure
Silica-supported perchloric acid (HClO4–SiO2): a mild, reusable and highly efficient heterogeneous catalyst for multicomponent synthesis of 1,4-dihydropyridines via unsymmetrical Hantzsch reaction
作者:Syed Sheik Mansoor、Krishnamoorthy Aswin、Kuppan Logaiya、Prasanna Nitiya Sudhan、Saleem Malik
DOI:10.1007/s11164-012-0968-0
日期:2014.1
Facile synthesis of some 1,4-dihydropyridine derivatives via Hantzsch reaction of 5,5-dimethyl-1,3-cyclohexanedione (dimedone), 1,3-diphenyl-2-propen-1-one derivatives and ammonium acetate under solvent-free condition in the presence of silica-supportedperchloricacid (HClO4–SiO2) is described. The catalyst is easily prepared, stable, reusable and efficient under the reaction conditions.
A series of 2,4-disubstituted polyhydroquinoline were synthesized and evaluated for their in vivo antihyperglycemic as well as antidyslipidemic activities. Several synthesized compounds have exhibited promising in vivo antihyperglycemic in SLM, STZ-S, and db/db mice model along with significant lipid and TG modulating activity. All these compounds were evaluated in various in vitro models of diabetes to know the possible mechanism of their antihyperglycemic action. Interestingly, compounds 3a-r (diaryl substitution) have exhibited promising protein-tyrosine phosphatase 1B (PTP1B) inhibitory activity whereas, compounds 5a-d (acid substituted) have shown significant glycogen phosphorylase activity. (C) 2009 Published by Elsevier Ltd.
Hu, Xueyuan; Zhang, Xinying; Fan, Xuesen, Journal of Chemical Research, 2005, # 11, p. 697 - 699
A straightforward and general method has been developed for the synthesis of C(5)-unsubstitiuted 1,4-dihydropyridines by a reaction using dimedone, acetophenone, aromatic aldehydes, and ammonium acetate in the presence of a catalytic amount of Co nanoparticles as a heterogeneous and eco-friendly catalyst with high catalytic activity at room temperature under solvent-free conditions. This catalyst is easily separated by magnetic devices and can be reused without any apparent loss of activity for the reaction. In addition, it is very interesting that when using Co nanoparticles as a catalyst, spatially-hindered aldehydes such as 2-methoxy-, 2-fluoro-, and 2-chloro-aldehydes are suitable for this reaction.